Question

Which one yields ATP required for muscle contraction?

• A. Myoglobin
• B. Creatine phosphate
• C. Creatinine phosphate
• D. Myosin

Answer 1

Answer: (B)

Creatine phosphate

• Muscles require energy for contractions.
• The energy for contractions is derived from ATP molecules present in muscles.
• Muscles tend to contain only limited quantities of ATP, as these ATP molecules get used up there is a need for resynthesizing of ATP.
• Creatine phosphate present within all muscle cells is a high-energy compound which breaks down to make more ATP quickly.
• In resting muscle, creatine combines with ATP to form creatine phosphate and ADP.
• During contraction, the creatine phosphate breaks into creatine and releases phosphorous which combine with ADP to form ATP. The ATP formed is used up by the muscles for contraction.